Sorry, but I disagree with that suggestion. What if they can't do it? (not unlikely for someone who has never done it) You can't keep meat chickens for a long time. Cornish Cross in particular are freaks that can't survive naturally and must be culled when young. Doing otherwise would be cruel.My suggestion would be to get a few meat chickens, don't treat them as pets, and then butcher them at around 8-10 weeks. You would quickly find out if processing your own birds is something you can do. I think it would be a lot harder to butcher your favorite hen after you have been feeding her for years and know each and every personality of the girls in your flock.
Many of us do not have farm friends that are used to culling chickens, nor do we have local processing centers. The latter have become highly centralized to serve Tyson/etc.
I paid for and attended a class on chicken harvesting some years ago. Paid $20 (I think) and they provided the chicken, demonstrated the process and coached us through doing one ourselves. I was able to get through it, but it was hard for me even though I didn't know the chicken. It is harder with one you've grown attached to, so I've stopped naming mine.
If you are new to chicken harvesting, I strongly recommend you get someone to help you get through one first. Then consider if you can/will do it again.